For the first question, we need to simplify the expression \(9(6x)\). This involves multiplying the constants together and then multiplying the result by \(x\).
For the second question, we need to simplify the expression \(-2(9a)\). This involves multiplying the constants together and then multiplying the result by \(a\).
Step 1: Simplifying \(9(6x)\)
To simplify the expression \(9(6x)\), we multiply the constants:
\[
9 \times 6 = 54
\]
Thus, the simplified expression is:
\[
9(6x) = 54x
\]
Step 2: Simplifying \(-2(9a)\)
Next, we simplify the expression \(-2(9a)\) by multiplying the constants:
\[
-2 \times 9 = -18
\]
Therefore, the simplified expression is:
\[
-2(9a) = -18a
\]
Final Answer
The simplified expressions are:
\[
\boxed{54x}
\]
\[
\boxed{-18a}
\]